GB/T 709-2006 Dimension, Shape, Weight and Tolerances for Hot Rolled Sheets and Plates (Text of Document is in English)

01/03/2006

23P

$50.00 USD

1. Scope
This national standard specifies the dimension, shape, weight and tolerances for hot-rolled sheets and plates.

This national standard is applicable to the single-sheet rolled steel plate ( hereinafter referred to as "single rolled steel plate"), steel strip and its shear steel plates (hereinafter referred to as "continuously rolled steel plate") and longitudinal-cutting steel strip, whose rolling width is not less than PREFIX = ST1 600mm.

2. Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments (excluding amending error in the text) to, or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these references are applied or not. For undated references, the latest edition of the normative document is applicable to this national standard.

GB/T 8170 Rules for Rounding-off of Numerical Values

3. Terms and Definitions
For the purposes of this national standard, the following terms and definitions are applied.

3.1 Steel plate or sheet
The steel plate or sheet is referred to the hot-rolled flat steel products with instable edges, including directly-rolled single rolled steel plate and the continuously rolled steel plate cutting from the wide steel strip.

3.2 Steel strip
The steel strip is referred to as the wide steel strip whose rolling width is not less than 600mm and that is delivered in coils.

4. Classification and Code Name
4.1 Classification according to the edge conditions

Cut edge EC;
Mill edge EM.

4.2 Classified according to the thickness tolerance
N-type tolerance: the plus tolerance is equal to the minus tolerance;
A-type tolerance: the minus tolerance specified according to the normal thickness;
B-type tolerance: the fixed minus tolerance is 0.3mm;
C-type tolerance: the fixed minus tolerance is zero, the plus tolerance specified according to the normal thickness.

4.3 Classified according to the thickness precision
Common thickness precision: PT.A;
Higher thickness precision: PT.B.